@article{ref1,
title="Junior league football: risks vs benefits",
journal="Journal of sports medicine",
year="1975",
author="Godshall, R. W.",
volume="3",
number="3",
pages="139-144",
abstract="<p>[Abstract unavailable]  Keywords: American football; Pop Warner football </p> <p>Language: en</p>",
language="en",
issn="0090-4201",
doi="",
url="http://dx.doi.org/"
}